Abstract
Soil zinc fractionation studies revealed that more than 90% of the total zinc occurred in the relatively inactive clay lattice bound form and that a small fraction, viz., 0.26, 0.74, 1.58 and 0.71% of the total occurred as water-soluble and exchangeable, organic complexed, amorphous sesquioxide, and crystalline sesquioxidebound forms. The applied zinc was transformed to the latter four forms following their relative order of preponderance in native soils and constituted on an average 3.68, 12.17, 19.85, and 5.33%, respectively, of the applied amount. Waterlogging caused an increase in the organic complexed and amorphous sesquioxide-bound forms of native soil zinc with a concomitant decrease in the content of the other forms, suggesting the occurrence of a dynamic equilibrium of these forms in soil. Simple correlation and multiple regression analyses showed that the zinc fractionation data obtained from the soils after incubation were more relevant than the same obtained from the cropped soil in predicting zinc concentration of lowland rice plants. The path coefficient analyses revealed that organic complexed zinc played the most important role in zinc nutrition of lowland rice and lent support to the validity of the zinc fractionation scheme suggested by Murthy (1982) and modified by us in this regard.
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Claims 14
Claim · model-written summary
More than 90% of soil zinc was clay lattice bound.
Not reportedTaxon
Verbatim
e0“Soil zinc fractionation studies revealed that more than 90% of the total zinc occurred in the relatively inactive clay lattice bound form and that a small fraction, viz., 0.26, 0.74, 1.58 and 0.71% of the total occurred as water-soluble and exchangeable, organic complexed, amorphous sesquioxide, and crystalline sesquioxidebound forms.”
Claim · model-written summary
Water-soluble and exchangeable zinc represented 0.26% of soil zinc.
Not reportedTaxon
Verbatim
e0“Soil zinc fractionation studies revealed that more than 90% of the total zinc occurred in the relatively inactive clay lattice bound form and that a small fraction, viz., 0.26, 0.74, 1.58 and 0.71% of the total occurred as water-soluble and exchangeable, organic complexed, amorphous sesquioxide, and crystalline sesquioxidebound forms.”
Claim · model-written summary
Organic complexed zinc represented 0.74% of soil zinc.
Not reportedTaxon
Verbatim
e0“Soil zinc fractionation studies revealed that more than 90% of the total zinc occurred in the relatively inactive clay lattice bound form and that a small fraction, viz., 0.26, 0.74, 1.58 and 0.71% of the total occurred as water-soluble and exchangeable, organic complexed, amorphous sesquioxide, and crystalline sesquioxidebound forms.”
Claim · model-written summary
Amorphous sesquioxide zinc represented 1.58% of soil zinc.
Not reportedTaxon
Verbatim
e0“Soil zinc fractionation studies revealed that more than 90% of the total zinc occurred in the relatively inactive clay lattice bound form and that a small fraction, viz., 0.26, 0.74, 1.58 and 0.71% of the total occurred as water-soluble and exchangeable, organic complexed, amorphous sesquioxide, and crystalline sesquioxidebound forms.”
Claim · model-written summary
Crystalline sesquioxidebound zinc represented 0.71% of soil zinc.
Not reportedTaxon
Verbatim
e0“Soil zinc fractionation studies revealed that more than 90% of the total zinc occurred in the relatively inactive clay lattice bound form and that a small fraction, viz., 0.26, 0.74, 1.58 and 0.71% of the total occurred as water-soluble and exchangeable, organic complexed, amorphous sesquioxide, and crystalline sesquioxidebound forms.”
Claim · model-written summary
Applied zinc became 3.68% water-soluble and exchangeable zinc.
Not reportedTaxon
Verbatim
e0“The applied zinc was transformed to the latter four forms following their relative order of preponderance in native soils and constituted on an average 3.68, 12.17, 19.85, and 5.33%, respectively, of the applied amount.”
e1“Soil zinc fractionation studies revealed that more than 90% of the total zinc occurred in the relatively inactive clay lattice bound form and that a small fraction, viz., 0.26, 0.74, 1.58 and 0.71% of the total occurred as water-soluble and exchangeable, organic complexed, amorphous sesquioxide, and crystalline sesquioxidebound forms.”
Claim · model-written summary
Applied zinc became 12.17% organic complexed zinc.
Not reportedTaxon
Verbatim
e0“The applied zinc was transformed to the latter four forms following their relative order of preponderance in native soils and constituted on an average 3.68, 12.17, 19.85, and 5.33%, respectively, of the applied amount.”
Claim · model-written summary
Applied zinc became 19.85% amorphous sesquioxide zinc.
Not reportedTaxon
Verbatim
e0“The applied zinc was transformed to the latter four forms following their relative order of preponderance in native soils and constituted on an average 3.68, 12.17, 19.85, and 5.33%, respectively, of the applied amount.”
Claim · model-written summary
Applied zinc became 5.33% crystalline sesquioxidebound zinc.
Not reportedTaxon
Verbatim
e0“The applied zinc was transformed to the latter four forms following their relative order of preponderance in native soils and constituted on an average 3.68, 12.17, 19.85, and 5.33%, respectively, of the applied amount.”
Claim · model-written summary
Waterlogging increased soil organic complexed zinc.
Not reportedTaxonComparator
Verbatim
e0“Waterlogging caused an increase in the organic complexed and amorphous sesquioxide-bound forms of native soil zinc with a concomitant decrease in the content of the other forms, suggesting the occurrence of a dynamic equilibrium of these forms in soil.”
Claim · model-written summary
Waterlogging increased soil amorphous sesquioxide-bound zinc.
Not reportedTaxonComparator
Verbatim
e0“Waterlogging caused an increase in the organic complexed and amorphous sesquioxide-bound forms of native soil zinc with a concomitant decrease in the content of the other forms, suggesting the occurrence of a dynamic equilibrium of these forms in soil.”
Claim · model-written summary
Waterlogging decreased other soil zinc forms.
Not reportedTaxonComparator
Verbatim
e0“Waterlogging caused an increase in the organic complexed and amorphous sesquioxide-bound forms of native soil zinc with a concomitant decrease in the content of the other forms, suggesting the occurrence of a dynamic equilibrium of these forms in soil.”
Claim · model-written summary
Post-incubation soil zinc fractionation better predicted rice zinc concentration than cropped-soil fractions.
Verbatim
e0“Simple correlation and multiple regression analyses showed that the zinc fractionation data obtained from the soils after incubation were more relevant than the same obtained from the cropped soil in predicting zinc concentration of lowland rice plants.”
Claim · model-written summary
Organic complexed zinc had the most important role in rice zinc nutrition.
Verbatim
e0“The path coefficient analyses revealed that organic complexed zinc played the most important role in zinc nutrition of lowland rice and lent support to the validity of the zinc fractionation scheme suggested by Murthy (1982) and modified by us in this regard.”